HOW TO MAKE EACH TEXTBOX PERFORM SUMMATION

Question

Dear Code Masters,

 

I am developing a program within the user interface i about ten(10) rows of textbox each rows have Six(6)  textbox the last textbox is made for to sum each rows.

 

see the picture below 

can any body show me how to allow each textbox sum as you enter figures because i have tried lost focus it works but when you make any changes it wont sum again.

 

any help please 

Answer 1

You can check by this code

 

Method 1

 

if(!String.IsNullOrEmpty(txtContent.Text)){

// it is true

}

else

{

 // it is false

}

 

Method 2

 

 if(txtContent.Text != "")
{

}

 

Method 3

if (txtContent != string.Empty)
{

}

 

Answer 2

Hello,

Thanks for accepting answer. For new question, ask same in new. with your code.

Answer 3

thanks Kalu and Nilesh

I works fine but in my code above when I click on the button to submit to database the whole page is refreshed I do need to stop that I tried with updatepanel but I could not I read about ajax but I have no idea how to do it

please help me it f you have any example

I appreciate that very much

Answer 4

if you want to restrict user from saving when txtcontent is null then you can use validation control, else write your query in if (txtContent.text !="").